I found this late Edo period sword on Ebay that is signed by Sanjo Munechika (三条宗近). I know Sanjo Munechika as a very famous smith from the Heian period, but couldn't find anything about this "late Edo Sanjo Munechika". I'm kind of confused and wonder if this sword is legit. Someone please educate me on this, would really appreciate any feedback.
here is the Ebay link:
https://www.ebay.com/itm/314058081007